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[order66]

@tmek;15926

Question: I’ve noticed that the chains and bridge rope moving in the wind is animated by World Offset in the material. The amount of motion is apparently multiplied by the vertex color (red and green channels) in order to “anchor” down the end points that shouldn’t move. I would expect when I look at the mesh in the editor and enable vertex color I would see a gradient near those end points where the chains/ropes are supposed to be attached to other geometry. But it just colors the whole mesh white. Am I doing something wrong? How can I see the underlying vertex colors?

Yes, you are right. The movement is applied based on vertex colors. The green channel controls the Y parameters, the red channel the X parameters (Speed, WaveAmplitude, WaveScale). But these vertex colors are not baked into the model. This way, you can have a different style of waves for each instance. To see or paint the vertex colors you have to use the paint tool:

https://docs.unrealengine/latest/INT/Engine/UI/LevelEditor/Modes/MeshPaintMode/VertexColor/index.html

Hope it is clear now